Analysis of EHL circular contact start up: Part II - Surface temperature rise model and results

A numerical model of surface temperature rise in elastohydrodynamic lubrica tion start up process is presented. The frictional heal flux is modeled as the product of lubricated contact pressure or solid contact pressure with i ts respective coefficient of friction. The temperature rise is calculated b y numerically integrating the solution of point heat source moving over a h alf space. The constant speed restriction is removed to allow calculation o f temperature rise on a surface with a variable speed. The FFT method is in corporated to speed up the temperature rise calculation. Surface temperatur e rise in elastohydrodynamic lubrication start up condition is calculated, for the case when speed increase from zero to desired speed occurs in one s tep and the case when speed is linearly increased to desired speed.